In a galaxy far from the Milky Way, the humanoid civilization C.H.I.L.D.A. has been at war with the mechanical Ver'mith for generations. Two of C.H.I.L.D.A.'s elite Triggerheart warriors—Exelica and her programmed sister Crueltear—are pulled through a dimensional Gate during combat and materialize on Earth. With no way home and no knowledge of the war's outcome, they settle in. Years later, surviving Ver'mith forces emerge through their own portal and begin converting Earth into a military stronghold. Exelica and Crueltear's dormant combat instincts reactivate, but this time the Ver'mith have their own Triggerheart equivalent: Faintear.